Keywords:
Image verification, Diagnostic procedure, Ultrasound, Elastography, CT, Lung
Authors:
R. Kubale1, H. Wilkens2, J. Stroeder2, R. Seidel2, A. Bücker3; 1Pirmasens/DE, 2Homburg/DE, 3Homburg a.d. Saar/DE
DOI:
10.1594/ecr2013/C-1684
Results
A good quality of the displacement map was achievable in 21/25 healthy patients (Fig.
4).
20/25 had a clear delineation between normal lung and pleura (Fig.
5).
Shear wave velocities varied between 1.8 to 2.5 m/s.
Four false positives seen in the control group are explained by congestion,
a peripheral infiltrate,
one subpleural metastasis and post radiation effects (Fig.
6).
16/20 patients of the fibrosis group had a reduced displacement in the subpleural space correlating with fibrotic areas and honey combing in CT (Fig.
7).
Influencing Factors
•Mechanical parameters of SVI–Depth and frequency–Push Pulse intensity–Size of ROI / number of detection pulses•Physical influencing factors–Signal-to noise ratio,
wave form (?)–Shear wave reflection artifacts•Physiological influencing factors–Muscle thickness an structure–Inspiration / Exspiration